UFO:Alien Invasion Code

* base/textures png crush.

* Recompressed all textures in base/textures/tex_vehicles with Trimage image compressor and commited those files, where a filesize reduction of at least 5% (up to 19.4%) was achieved

* Minor map texture rescale operation:
* [TEXTURE_.MAP_RESCALE-tex_buildings/wall023-0.5-0.5]
* [TEXTURE_.MAP_RESCALE-tex_buildings/wall024-0.5-0.5]
* [TEXTURE_.MAP_RESCALE-tex_buildings/wall025-0.5-0.5]
* [TEXTURE_.MAP_RESCALE-tex_doors/door009-0.3125-0.3125] Previous tex size was non-power-of-2: 160x80 pixel
* [TEXTURE_.MAP_RESCALE-tex_material/metal002-0.25-0.25]
* [TEXTURE_.MAP_RESCALE-tex_material/metall007-0.25-0.25]
* [TEXTURE_.MAP_RESCALE-tex_misc/pipes002-0.3125-0.5] Previous tex size was non-power-of-2: 160x128 pixel
* [TEXTURE_.MAP_RESCALE-tex_vehicles/gabstap_b-0.25-0.25]
*
* Rescaled all above mentioned textures on all map files and prefabs
*
* Replaced wall023 and wall023_nm with their high-res doubles
* Removed redundant wall023lrg and wall023lrg_nm
* Replaced non-power-of-2 door009.jpg texture with high-res, hq png version
* Replaced metal002.jpg with hq, high-res png version
* Replaced metall007.jpg with hq, high-res png version
* Replaced pipes002.jpg with hq, high-res png version
* Replaced gabstap_b with hq, high-res version
*
* Updated LICENSES

* Reduced filesizes of the tex_vehicles texture folder by compressing/optimizing the files with pngout

* GPL'd truck textures from p0ss and a couple loose ends